Circuit closing device



June 15 1937. 6, H BROWN 2,084,076

CIRCUIT CLOSING DEVICE Filed NOV. 11, 1935 Guy H 5,90 w/v' Patented June15, 1937 UNITED STATES PATENT OFFICE 1 Claim.

My invention relates to a circuit closing device particularly adapted for operating a signal device in service stations and garages to inform I the attendants of the arrival of a motor vehicle. It is an object of the invention to provide a circuit closer which is operated by a vehicle passing over a flexible conduit containing a suitable fluid, which under pressure actuates the circuit closer to operate the signal.

A further object of the invention is to provide a circuit closer which upon being set in operation by the pressure of the fluid will intermittently operate the signal device.

Another object of the invention is to provide a device of the above-mentioned character which is simple and durable in construction, reliable and eflicient in operation, and inexpensive to manufacture.

Other objects and advantages of the invention will be apparent during the course or the following description.

Figure 1 is a longitudinal sectionalview of the circuit closing device,

Figure 2 is a horizontal section taken on the line 2-2 of Figure'l, and

Figure 3 is a vertical section taken on the line 3'-3 of Figure 1. I

In the drawing, wherein for the purpose of illustration, I have shown a preferred embodimerit of my invention, the numeral 5 denotes a metal container for holding a suitable fluid 6,

such as non-freezing oil. A pipe '1 extends through the center of the bottom of the container, the lower end of the pipe being curved at right angles and connected to one end or a flexible conduit or hose 8, which has its opposite end closed. The upper end of the pipe terminates above the bottom of the container and is covered by a cap 9, the walls of which are spaced from the walls of the pipe, to provide a space ID for the passage of the fluid between the pipe and container. The lower edge of the cap normally rests on the bottom of the container and atspaced intervals is provided with notches II,

5' to permit passage of the fluid when the cap is within the con- (Cl. ZOO- 86) the outer end of the strip I4 is a plunger I5 adapted to be engaged by the cap 3 when the same is forced upwardly by the fluid pressure.

Disposed intermediate the strips I3 and I4 is a vibrating contact strip I6 extending through the center of the insulation block 9. The free end of the strip I6 extends beyond the ends of the strips I3 and I4 and a weight I! is adjustably mounted-on the free end to adjust the vibration of the ,strip and is held in its adjusted position by a set screw I8; The contact strips I3 and I4 are each provided with contact points I9 and 20 which are alternately engaged by the vibrating strip I6 when set in operation. A suitable signal, such as a buzzer or horn 2| is connected in circuit with the circuit closer through wires 22 and 23, the wire 22 being connected to the con upon the passing of a vehicle over the hose, the

fluid within the hose is compressed and thereby forcibly ejected from the end of the pipe 1 within the container. The pressure of the discharged fluid from the end of the pipe I forces the cap 9 to move upwardly into engagement with the plunger I5 which causes the flexible contact strip l4 through its contact point '20 to engage and set in operation the vibrating contact strip I6. As the strip I5 vibrates, it alternately engages the contact points I9 and 20, which intermittently close the signal circuit causing sounding of the buzzer 2|, to inform the attendants of the service station that a vehicle has entered the station. After the vehicle has passed over the hose 8, the fluid discharged into the container 5 will be caused to Hot; back into the pipe and hose through the suction created n the hose when expanded to its normal position.

It is to be understood that the form of my invention herewith shown and described is to be taken as a, preferred example or the same and that certain changes in the shape, size, and arrangement of the parts may be made without departing from the spirit of the invention or scope of the subjoined claim.

What is claimed is: v

A circuit closer comprising a. container, a pair bottom of the container and having passages therethrough, said cup being adapted to be elevated into engagement with said plunger by the pressure of liquid discharged from the protruding end of said duct when the compressible container is compressed, whereby said plunger raises said flexible contact strip to set said vibrating strip into operation, and a liquid in said firstnamed container to a depth to cover said passages when said cup is in elevated position.

GUY H. BROWN. 

